3502516
Descripción
Test por nicilynn1981, actualizado hace más de 1 año
|
Creado por nicilynn1981
hace más de 8 años
|
|
Pregunta 1
Pregunta
Every atom must contain what types of particles?
Respuesta
-
Electrons and protons
-
Electrons and neutrons
-
Protons and neutrons
-
Electrons, protons and neutrons
Pregunta 2
Pregunta
An atom with 8 electrons in its outermost shell is said to be
Respuesta
-
Free
-
Stable
-
Valence
-
Ionized
Pregunta 3
Pregunta
How many valence electrons are needed to make a good conductor?
Respuesta
-
3
-
4
-
5
-
6
Pregunta 4
Pregunta
"Dielectric" is the term used for
Respuesta
-
Conductors
-
Insulators
-
Doped atoms
-
Semi-conductors
Pregunta 5
Pregunta
The flow or drift of electrons through a conductor” in the same direction at the same time is the definition of
Respuesta
-
Conductivity
-
Voltage
-
Current
-
Valence
Pregunta 6
Pregunta
The potential difference between two points in a circuit that exerts a force on free electrons is called
Respuesta
-
Conductivity
-
Voltage
-
Current
-
Valence
Pregunta 7
Pregunta
What is used to control current flow in a circuit?
Respuesta
-
Voltage
-
Coulombs
-
Resistance
-
Conductivity
Pregunta 8
Pregunta
The relationship of voltage, current and resistance is expressed through
Respuesta
-
E, I and C
-
Power formulas
-
Conductance
-
Ohm's Law
Pregunta 9
Pregunta
Total current in a series circuit is equal to the
Respuesta
-
Current through one component
-
Sum of the current through each component
-
Reciprocal of the current through one component
-
Reciprocal of the sum of the currents through each component
Pregunta 10
Pregunta
What is the wattage of a circuit with 28 volts applied and a total resistance of .2 ohms?
Respuesta
-
.14 watts (w)
-
.14 kilowatts (kW)
-
3.92 W
-
3.92 kW
Pregunta 11
Pregunta
In a parallel circuit, the total voltage is equal to the
Respuesta
-
Sum of the voltages across each branch
-
Voltage across each resistor
-
Voltage across each branch
-
The reciprocal of the voltage across the resistances
Pregunta 12
Pregunta
Source current in a parallel circuit will be divided according to branch
Respuesta
-
Voltage
-
Powers
-
Lengths
-
Resistances
Pregunta 13
Pregunta
The area around a magnet where its influence can be felt is the definition of the
Respuesta
-
Saturation principle
-
Magnetic theory
-
Magnetic field
-
Law of attraction and repulsion
Pregunta 14
Pregunta
“The ability of a material to pass lines of force” is a definition of
Respuesta
-
Permeability
-
Reluctance
-
Electromagnetism
-
Retentively
Pregunta 15
Pregunta
The magnetism that remains after the magnetizing force has been removed is known as
Respuesta
-
Electromagnetism
-
Molecular magnetism
-
Permeability
-
Residual magnetism
Pregunta 16
Pregunta
The magnetic field of an electromagnet can be varied by changing the
Respuesta
-
Type of core
-
Number of turns in the coil
-
Amount of current through the coil
-
All of the above
Pregunta 17
Pregunta
The electromechanical generation of a voltage requires a magnetic field, relative motion, and
Respuesta
-
A complete circuit
-
A conductor
-
An insulator
-
A load
Pregunta 18
Pregunta
The principle behind all electromechanical generation is
Respuesta
-
Conduction
-
Commutation
-
Rectification
-
Electromagnetic induction
Pregunta 19
Pregunta
The function of the commutator in a DC generator is to
Respuesta
-
Complete the circuit to the load
-
Induce DC into the external circuit
-
Rectify the input
-
Change AC voltage to DC voltage
Pregunta 20
Pregunta
Because an inductor stores energy and then returns it to the circuit, it is called a
Respuesta
-
Resistive device
-
Reactive device
-
Retentive device
-
Retroactive device
Pregunta 21
Pregunta
An inductor stores energy in the form of
Respuesta
-
Heat
-
Resistance
-
A magnetic field
-
An electrostatic field
Pregunta 22
Pregunta
The process by which a current change in one coil produces a voltage in another coil is called
Respuesta
-
Inductance
-
Self-induction
-
Mutual induction
-
None of the above
Pregunta 23
Pregunta
A transformer will change all of the following except
Respuesta
-
Power
-
Current
-
Voltage
-
Resistance
Pregunta 24
Pregunta
Normally, the winding of a transformer that is connected to a power source is known as the
Respuesta
-
Field winding
-
Primary winding
-
Current winding
-
Secondary winding
Pregunta 25
Pregunta
What kind of turns of wire is found in the secondary windings of a step up transformer?
Respuesta
-
Equal
-
Less
-
More
-
All of the above
Pregunta 26
Pregunta
A relay is an electrically operated
Respuesta
-
Meter
-
Motor
-
Switch
-
Safety device
Pregunta 27
Pregunta
A relay that, once energized, requires a second coil to be energized before the contacts will return to their original positions is called a
Respuesta
-
Locking relay
-
Latching relay
-
Timing relay
-
Tripping relay
Pregunta 28
Pregunta
A capacitor stores energy in the form of
Respuesta
-
Heat
-
Resistance
-
A magnetic field
-
An electrostatic field
Pregunta 29
Pregunta
In a capacitor, the dielectric is the
Respuesta
-
Positive lead
-
Conductor
-
Insulator
-
Outer case
Pregunta 30
Pregunta
Opposition of a capacitor to AC is called
Respuesta
-
Inductive reactance
-
Impedance
-
Capactive reactance
-
Capacitance
Pregunta 31
Pregunta
The factors which determine the time required to charge a capacitor are the capacitance and the
Respuesta
-
Applied voltage
-
Circuit current
-
Amount of resistance
-
Type of dielectric
Pregunta 32
Pregunta
The anode of a diode is constructed of
Respuesta
-
Neutral material
-
Biased material
-
Positive material
-
Negative material
Pregunta 33
Pregunta
Expanding or contracting the depletion region of a diode is called
Respuesta
-
Basing
-
Gating
-
Spiking
-
Biasing
Pregunta 34
Pregunta
A diode placed in a circuit in reverse bias is being used as
Respuesta
-
A spike protector
-
An amplifier
-
A regulator
-
A rectifier
Pregunta 35
Pregunta
A zener will conduct in reverse bias
Respuesta
-
For a second or two at a time
-
Until gate potential has been reached
-
Once the avalanche point has been reached
-
Until the breakdown point has been reached
Pregunta 36
Pregunta
A zener being used as a regulator must have a resistor placed in the circuit in
Respuesta
-
Series
-
Parallel
-
Reverse bias
-
Series-parallel
Pregunta 37
Pregunta
What is the approximate operating voltage of a LED?
Respuesta
-
.5 volts
-
.1 volt
-
1.6 volts
-
2.4 volts
Pregunta 38
Pregunta
The SCR has how many PN junctions?
Respuesta
-
1
-
2
-
3
-
4
Pregunta 39
Pregunta
The amount of current required to gate an SCR is called
Respuesta
-
Forward break over voltage
-
Holding current
-
Peak voltage
-
Gate current
Pregunta 40
Pregunta
In order for an SCR to be turned off
Respuesta
-
The forward break over voltage must exceed the holding voltage.
-
The current must drop below the holding current.
-
The negative amp switch must activate.
-
The negative volt switch must activate.
Pregunta 41
Pregunta
The best method of troubleshooting is the
Respuesta
-
Systematic method
-
Instantaneous method
-
Hit-and-miss method
-
Trial-and-error method
Pregunta 42
Pregunta
Which troubleshooting step is done by knowing proper equipment operation?
Respuesta
-
Analysis
-
Recognition
-
Repair and check
-
Elimination and isolation
Pregunta 43
Pregunta
During which troubleshooting step do you try to determine which system could cause the malfunction?
Respuesta
-
Analysis
-
Verification
-
Recognition
-
Elimination and isolation
Pregunta 44
Pregunta
During which troubleshooting step do you first use the schematic diagram?
Respuesta
-
Recognition
-
Verification
-
Analysis
-
Isolation
Pregunta 45
Pregunta
Which troubleshooting aid is designed to aid you if you see an unfamiliar symbol?
Respuesta
-
Zones
-
Schematic
-
Wiring diagram
-
Reference designation index
Pregunta 46
Pregunta
Which troubleshooting aid is designed to aid you in finding components on a diagram?
Respuesta
-
Zones
-
Schematic
-
Wiring diagram
-
Reference designation index
Pregunta 47
Pregunta
When used in a series circuit to measure voltage, how is a multimeter connected in the circuit?
Respuesta
-
In series
-
To ground
-
In parallel
-
In series-parallel
Pregunta 48
Pregunta
To set a value to the height of the oscilloscope grid markings, you adjust the
Respuesta
-
Focus
-
Pitch control
-
Voltage selector
-
Time sweep selector
Pregunta 49
Pregunta
To ensure accuracy of an oscilloscope when preparing for operation you should always,
Respuesta
-
Zero the display
-
Center the display
-
Identify the cal point and adjust to zero
-
Identify the cal point and calibrate the display
Pregunta 50
Pregunta
When you are testing a transformer, an open coil reading on the 8025A multimeter will be indicated by
Respuesta
-
A beep
-
An extending analog bar graph
-
OL
-
0 ohms
Pregunta 51
Pregunta
Which could be the indication from the 8025A multimeter when you are checking a serviceable capacitor?
Respuesta
-
A beep
-
An extending analog bar graph
-
OL
-
0 ohms
Pregunta 52
Pregunta
How many junctions are checked to test the serviceability of a transistor?
Respuesta
-
1
-
2
-
3
-
4
Pregunta 53
Pregunta
When checking a FET, you must check the diode junction and the continuity between the
Respuesta
-
Gate and source
-
Source and drain
-
Gate and substrate
-
Substrate and drain
Pregunta 54
Pregunta
How can you identify an electrostatic sensitive device?
Respuesta
-
The package will have special coloring as specified in local directives.
-
The package will have a special control number as specified in local directives.
-
It will be marked with the MIL-STD–129 symbol or a caution marking.
-
It will be marked with the MIL-SPC–235 symbol or a warning marking.
Pregunta 55
Pregunta
A heat sink is used in soldering to
Respuesta
-
Prevent heat from damaging the component being soldered
-
Prevent heat from damaging other components in the circuit
-
Apply heat to the component being soldered
-
Apply heat to other components in the circuit
Pregunta 56
Pregunta
A pitted or worn soldering iron tip should be redressed with a flat, fine, single-cut file and should be
Respuesta
-
Tinned
-
Clean of solder
-
Replaced
-
Checked for length
Pregunta 57
Pregunta
The first step in soldering a conductor is to
Respuesta
-
Wick the wire
-
Remove the insulation
-
Apply heat to the connection
-
Apply solder to the connection
Pregunta 58
Pregunta
When soldering flat perforated terminals, the conductor is connected to the terminal using
Respuesta
-
90 degree wrap
-
180 degree wrap
-
270 degree wrap
-
360 degree wrap
Pregunta 59
Pregunta
A wire is inserted into a solder cup until the
Respuesta
-
Wire touches the bottom
-
Wire clears the top of the cup
-
Insulation touches the cup
-
Wire protrudes from the weep hole
Pregunta 60
Pregunta
The best method of repairing a lifted circuit track on a PCB is to
Respuesta
-
Bond it
-
Glue it
-
Replace it with bare wire
-
Replace it with insulated wire
¿Quieres crear tus propios Tests gratis con GoConqr? Más información.